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Core java - Interview Questions and Answers for 'Coupang' - 1 question(s) found - Order By Newest

Very frequently asked across all types of companies.
  Q1. Difference between HashMap and Hashtable?Core Java
Ans. Hashtable is synchronized whereas HashMap is not.HashMap allows null values whereas Hashtable doesnt allow null values.

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  Which interface does java.util.Hashtable implement ?
  Which of the following is false ?
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a. HashTable
b. HashMap
c. TreeMap
d. LinkedHashMap
 Difference between concurrentHashMap and HashTable ?



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